Knitted component for an article of footwear

ABSTRACT

A knitted component may have a first portion, where the first portion has a first layer and a second layer, and where the first layer and the second layer each have opposite-facing surfaces. The first layer and the second layer may be secured via at least one knit structure of the knitted component at a boundary of the first portion. The first layer may form at least one of: (a) an overfoot portion of an article of footwear such that the pocket forms a void of the article of footwear for receiving a foot and such that the first layer forms a top surface of the void, and (b) an underfoot portion of the article of footwear such that the first layer forms a bottom surface of the void of the article of footwear.

RELATED MATTERS

This application claims the benefit of U.S. Provisional Application No.62/513,109, filed May 31, 2017, which is hereby incorporated byreference in its entirety.

BACKGROUND

Conventional articles of footwear generally include two primaryelements: an upper and a sole structure. The upper is secured to thesole structure and forms a void within the article of footwear forcomfortably and securely receiving a foot. The sole structure is securedto a lower surface of the upper so as to be positioned between the upperand the ground. In some articles of footwear, the sole structure mayinclude a midsole and an outsole. The midsole may be formed from apolymer foam material that attenuates ground reaction forces to lessenstresses upon the foot and leg during walking, running, and otherambulatory activities. The outsole may be secured to a lower surface ofthe midsole and forms a ground-engaging portion of the sole structurethat is formed from a durable and wear-resistant material.

The upper of the article of footwear generally extends over the instepand toe areas of the foot, along the medial and lateral sides of thefoot, and around the heel area of the foot. An ankle opening in a heelarea generally provides access to the void in the interior of the upper.A lacing system is often incorporated into the upper to adjust the fitof the upper, thereby facilitating entry and removal of the foot fromthe void within the upper. The upper may include a tongue that extendsunder the lacing system to enhance adjustability of the footwear, andthe upper may incorporate a heel counter to limit movement of the heel.

BRIEF SUMMARY

One general aspect of the present disclosure includes a knittedcomponent with a first portion, where the first portion has a firstlayer and a second layer, and where the first layer and the second layereach have opposite-facing surfaces. The first layer and the second layermay form a pocket therebetween, and the first layer and the second layermay be secured via at least one knit structure of the knitted componentat a boundary of the first portion. A second portion may extend from theboundary of the first portion and may be secured at the boundary via atleast one knit structure of the knitted component. The second portionmay form an outer surface of an article of footwear on at least one of amedial and lateral side, where the second layer of the first portion atleast partially forms an underfoot area of the knitted component. Thefirst layer of the first portion may form at least one of: (a) anoverfoot portion of an article of footwear such that the pocket forms avoid of the article of footwear for receiving a foot and such that thefirst layer forms a top surface of the void, and (b) an underfootportion of the article of footwear such that the first layer forms abottom surface of the void of the article of footwear.

Another general aspect of the present disclosure includes a knittedcomponent with a first portion having a first layer with twoopposite-facing surfaces and a second layer with two opposite-facingsurfaces, where the first layer and the second layer form a pockettherebetween, and where the first layer and the second layer share atleast one common knit structure at a boundary. A second portion mayextend from the boundary of the first portion and may share at least onecommon knit structure with the first portion at the boundary. The secondportion may form an outer surface on at least one of a lateral side anda medial side of an article of footwear.

Another general aspect of the present disclosure includes a methodincluding the step of knitting a first portion of a knitted component.The first portion may have a first layer and a second layer each havingopposite-facing surfaces, the first layer and the second layer forming apocket therebetween, and the first layer and the second layer beingsecured via a knit structure of the knitted component at a boundary ofthe first portion. The method may also include the step of knitting asecond portion of the knitted component, the second portion extendingfrom the boundary of the first portion and secured at the boundary viaat least one knit structure, where the second portion forms an outersurface of an article of footwear, and where the second layer of thefirst portion at least partially forms an underfoot area of the knittedcomponent. The first layer of the first portion may form at least oneof: (a) an overfoot portion of an article of footwear such that thepocket forms a void of the article of footwear for receiving a foot andsuch that the first layer forms a top surface of the void, and (b) anunderfoot portion of the article of footwear such that the first layerforms a bottom surface of the void of the article of footwear.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration showing a lateral side view of an article offootwear in accordance with the present disclosure.

FIG. 2 is an illustration showing a second lateral side view of thearticle of footwear of FIG. 1, where certain portions are in a spread oropened configuration to showcase certain features.

FIG. 3 is an illustration showing a sectional view of the article offootwear of FIG. 2 taken along line 3-3.

FIG. 4 is an illustration showing the knitted component for the articleof footwear of FIGS. 1-3 as it may appear after a knitting process.

FIG. 5 is an illustration showing a lateral side view of anotherembodiment of an article of footwear including a knitted component inaccordance with the present disclosure.

FIG. 6 is an illustration showing a second lateral side view of thearticle of footwear of FIG. 5, where certain portions of the article offootwear are in a spread or opened configuration to showcase certainfeatures.

FIG. 7 is an illustration showing a knitting pattern for forming theknitted component for use in the article of footwear of FIGS. 5-6.

FIG. 8 is an illustration showing a sectional view of the article offootwear of FIG. 6 taken along line 8-8.

FIG. 9 is an illustration showing a lateral side view of anotherembodiment of an article of footwear including a knitted component inaccordance with the present disclosure.

FIG. 10 is an illustration showing a sectional view of the article offootwear of FIG. 9 taken along line 10-10.

DETAILED DESCRIPTION

Various aspects are described below with reference to the drawings inwhich like elements generally are identified by like numerals. Therelationship and functioning of the various elements of the aspects maybetter be understood by reference to the following detailed description.However, aspects are not limited to those illustrated in the drawings orexplicitly described below. It also should be understood that thedrawings are not necessarily to scale, and in certain instances detailsmay have been omitted that are not necessary for an understanding ofaspects disclosed herein, such as conventional fabrication and assembly.

Certain aspects of the present disclosure relate to uppers configuredfor use in an article of footwear and/or other articles, such as articleof apparel. When referring to articles of footwear, the uppers may beused in connection with any type of footwear. Illustrative, non-limitingexamples of articles of footwear include a basketball shoe, a bikingshoe, a cross-training shoe, a global football (soccer) shoe, anAmerican football shoe, a bowling shoe, a golf shoe, a hiking shoe, aski or snowboarding boot, a tennis shoe, a running shoe, and a walkingshoe. The uppers may also be incorporated into non-athletic shoes, suchas dress shoes, loafers, and sandals.

FIG. 1 is an illustration showing an article of footwear 100 formed withan upper 102, where the upper 102 is substantially formed as a textilecomponent. The textile component may be any suitable type of textile,and in some embodiments it may be formed as a knitted component 104. Asshown, the knitted component 104 may be secured to a sole structure 106.The upper 102 may include a lateral side 108 and a medial side 110. Thearea where the sole structure 106 joins the upper 102 may be referred toas a biteline 112. The upper 102 may be joined to the sole structure 106in a fixed manner using any suitable technique, such as through the useof an adhesive, by sewing, etc. The upper 102 may extend partially orcompletely around a foot of a wearer and/or may be integral with thesole structure 106, and a sockliner may or may not be used. In someembodiments, the sole structure 106 may include a midsole (not shown)and an outsole.

The upper 102 may additionally include a throat area 114 extending fromand the ankle opening 116 leading to the void 118, and a collar 120 mayat least partially surround an ankle opening 116. The void 118 of thearticle of footwear 100 may be configured (e.g., sized and shaped) toreceive and accommodate a foot of a person. The throat area 114 may begenerally disposed in a midfoot area 122 of the upper 102. The midfootarea 122 of the upper 102 may be located between a heel area 124 and atoe area 126. In some embodiments, an optional tongue (such as thetongue shown in FIG. 6) may be disposed at least partially in the throatarea 114. The tongue may be any type of tongue, such as a gussetedtongue or a burrito tongue. If a tongue is not included (or incombination with a tongue), the lateral and medial sides of the throatarea 114 may be joined together.

The article of footwear 100 may include a fastening element. Anysuitable type of fastening element may be used, such as the depictedlace 130, a cable-tensioning system, and/or any other suitable device.The upper 102 may be configured to secure to and communicate with thefastening element such that the fastening element may adjust and/ortighten the upper 102 around a foot of a wearer. For example, the upper102 may include a set of apertures 128 for receiving the fasteningelement, but other suitable element(s) may alternatively be used.

At least a portion of the upper 102, and potentially the entirety of theupper 102, may be formed of the knitted component 104 (or anothersuitable textile component). The knitted component 104 may be formed asan integral one-piece element during a knitting process, such as a weftknitting process (e.g., with a flat knitting machine or circularknitting machine), a warp knitting process, or any other suitableknitting process. That is, the knitting process on the knitting machinemay substantially form the knit structure of the knitted component 104without the need for significant post-knitting processes or steps.Alternatively, two or more portions of the knitted component 104 may beformed separately as distinct integral one-piece elements and then therespective elements attached.

Forming the upper 102 with the knitted component 104 may provide theupper 102 with advantageous characteristics including, but not limitedto, a particular degree of elasticity (for example, as expressed interms of Young's modulus), breathability, bendability, strength,moisture absorption, weight, abrasion resistance, and/or a combinationthereof. These characteristics may be accomplished by selecting aparticular single layer or multi-layer knit structure (e.g., a ribbedknit structure, a single jersey knit structure, or a double jersey knitstructure), by varying the size and tension of the knit structure, byusing one or more yarns formed of a particular material (e.g., apolyester material, a relatively inelastic material, or a relativelyelastic material such as spandex), by selecting yarns of a particularsize (e.g., denier), and/or a combination thereof. The weight of theknitted component 104, and thus the overall weight of the article offootwear 100, may be reduced with respect to alternative componentstypically used in footwear. The knitted component 104 may also providedesirable aesthetic characteristics by incorporating yarns havingdifferent colors, textures or other visual properties arranged in aparticular pattern. The yarns themselves and/or the knit structureformed by one or more of the yarns of the knitted component 104 may bevaried at different locations such that the knitted component 104 hastwo or more portions with different properties (e.g., a portion formingthe throat area 114 of the upper 102 may be relatively elastic whileanother portion may be relatively inelastic). In some embodiments, theknitted component 104 may incorporate one or more materials withproperties that change in response to a stimulus (e.g., temperature,moisture, electrical current, magnetic field, or light). For example,the knitted component 104 may include yarns formed of a thermoplasticpolymer material (e.g., a polyurethane, polyamide, polyolefin, and/ornylon) that transitions from a solid state to a softened or liquid statewhen subjected to certain temperatures at or above its melting point andthen transitions back to the solid state when cooled. The thermoplasticpolymer material may provide the ability to heat and then cool a portionof the knitted component 104 to thereby form an area of bonded orcontinuous material (herein referred to as a “fused area”) that exhibitscertain advantageous properties including a relatively high degree ofrigidity, strength, and water resistance, for example.

FIG. 2 is an illustration showing a second lateral side view of thearticle of footwear 100 of FIG. 1. In FIG. 2, the upper 102 is depictedwithout a lace or other fastening element and with certain portionsspread out from their typical wearable configurations to showcasecertain features of the knitted component 104. As shown, a first portion132 of the knitted component 104 may be located between a second portion134 and a third portion 136. In some embodiments, the first portion 132,the second portion 134, and/or the third portion 136 may be formedtogether on a knitting machine such that they share a common yarn, acommon loop, a common course, a common wale, and/or another common knitstructure. Thus, the first portion 132 may be secured to the secondportion 134 via at least one knit structure of the knitted component 104(such as a common course, a common wale, a common loop, and/or a commonyarn), and similarly the first portion 132 may be secured to the thirdportion 136 via at least one knit structure of the knitted component104. Advantageously, no post-knitting step may be necessary forconnecting the respective portions of the knitted component, which maysave material cost and manufacturing time thereby decreasing the endcost to a consumer.

The second portion 134 and/or the third portion 136 may form an outersurface 138 of the upper 102 on at least one of the lateral side 108 andthe medial side 110 of the article of footwear 100. In the embodiment ofFIG. 2, for example, the second portion 134 forms at least a portion ofthe outer surface 138 on the lateral side 108 and the third portion 136forms at least a portion of the outer surface 138 on the medial side 110of the article of footwear. As shown, the second portion 134 and/or thethird portion 136 may overlap the first portion 132 (i.e., the secondportion 134 and the third portion 136 may be coextensive with the firstportion 132 on the medial side 110 and lateral side 108, respectively).Thus, an inner surface 146 of the second portion 134 and/or an innersurface 148 of the third portion 136 may face, and potentially contact,the first portion 132 when the article of footwear 100 is in a wearableconfiguration.

At least one of the first portion 132, the second portion 134, and thethird portion 136 of the knitted component 104 may optionally have morethan one layer of knitted material. When a portion of the knittedcomponent 104 has more than one layer, the multiple layers may beintegrally formed (e.g. together during a knitting or other textilemanufacturing process), or they may alternatively be separately formedand later attached. In some embodiments, the multiple layers may beformed on multiple needle beds of a knitting machine but may be integraland tightly bound together such that they are inseparable and/or are notreadily distinguishable (visually or otherwise), and thus “multiplelayers” is not limited to separable layers having a pocket or otherspace therebetween. However, in some embodiments, the multiple layersmay be separable and/or otherwise movable with respect to one anotherand may form a pocket therebetween.

For example, as shown in FIGS. 2-3, the first portion 132 of the knittedcomponent 104 may have two separable layers: an upper layer (depicted asthe first layer 140) and a lower layer (depicted as the second layer142). The first layer 140 and the second layer 142 may converge andsecure to one another at a boundary 150 of the first portion 132. Theboundary may be the point of attachment between the first layer 140 andthe second layer 142, and the attachment may be provided by a commoncourse, loop, wale, and/or yarn extending between the first layer 140and the second layer 142. Other attachment devices and/or methods arealso contemplated (e.g., the first layer 140 and the second layer 142may be sewn together, secured via an adhesive, etc.). The boundary 150may be located on at least one of the lateral side 108 and the medialside 110 and on the outer surface 138 (as shown in FIG. 2) such that aportion of the second layer 142 is exposed on an overfoot portion of theknitted component 104. In other embodiments, the boundary 150 may beapproximately aligned with the biteline 112 and/or may be located on anunderfoot portion of the knitted component 104.

When the first portion 132 has multiple layers, the first layer 140 mayprimarily be formed on a front needle bed of the knitting machine andthe second layer 142 may primarily be formed on a back needle bed (orvice versa). If the two layers are separable and define a pockettherebetween, the layer formed on the front needle bed and/or the layerformed on the back needle bed may have a single jersey knit structure oranother knit structure incorporating needles from only one bed.

Other knitting techniques may be additionally or alternatively used toform a multi-layer structure. For example, it is contemplated that bothlayers could utilize needles from each bed during the knitting processto enhance the ability to integrate functional and/or visual featureswithin each layer. For example, one or more consecutive courses of thefirst layer 140 may utilize needles from both needle beds to provide thefirst layer 140 with a particular multi-bed knit structure. Then, priorto or during knitting one or more courses of the second layer 142, allloops of the first layer 140 may be transferred to a first needle bed tofree the needles on the second needle bed to form the second layer 142(and to prevent the first layer 140 from binding to the second layer142). The second layer 142 may then be knitted on the second bed aloneor may utilize needles on both needle beds (particularly if the firstlayer 140 leaves some needles on the first needle bed unoccupied). Ifthe second layer 142 is formed on both beds, once it is time to resumeknitting courses of the first layer 140, all loops associated with thesecond layer 142 may be transferred to the second bed to free the firstbed for again forming the first layer 140 (and to prevent the secondlayer 142 from binding with the first layer 140). This process may berepeated as necessary.

If necessary, when knitting the first layer 140 and/or the second layer142, certain needles on each bed may be skipped by the first layer 140and/or the second layer 142 to leave needles unoccupied for knitting theother layer. Thus, the first layer 140 and/or the second layer 142 mayhave a reduced gauge and/or stitch density when compared to the knitstructure of the second portion 134 and the third portion 136 of FIG. 2(which are formed of a full-gauge or substantially full-gauge inexemplary embodiments). In some embodiments, a gauge of the first layer140 and/or the second layer 142 (defined by the ratio of the number ofneedles used to the total number of needles available) may be at least25% less than a gauge of the second portion 134 and/or a gauge of thethird portion 136. In exemplary embodiments, the gauge of the firstlayer 140 (which may be relatively elastic) is about 50% or less thanthe gauge of the second portion 134 and the gauge of the third portion136.

FIG. 3 is an illustration showing a sectional view of the article offootwear of FIG. 2 taken along line 2-2. As shown, the first layer 140and the second layer 142 may each have opposite-facing surfaces, and apocket 154 may be located between the first layer 140 and the secondlayer 142. That is, the first layer 140 may include a first top surface156 and a first bottom surface 158 and the second layer 142 may includea second top surface 160 and a second bottom surface 162. The firstbottom surface 158 and the second top surface 160 may face the pocket154, and the first top surface 156 and the second bottom surface 162 mayface away from the pocket 154.

In the depicted embodiment, the second layer 142 may form an underfootportion associated with a plantar aspect of the foot (also known as thesole or bottom of a foot). The first layer 140 of the knitted component104 may at least partially form an overfoot portion associated with theremainder of the foot, including the dorsal surface (i.e., the top ofthe foot), particularly in the throat area 114. As shown, the second topsurface 160 may contact the plantar aspect of the foot (or sock) of awearer during typical use, and the first bottom surface 158 may contactthe dorsal surface of the foot. It is also contemplated that a liner oranother component may be located between the knit surfaces and the void,but a liner is optional.

When the first layer 140 is configured to form an overfoot portion ofthe upper 102, it may be advantageous for the first layer 140 to have arelatively high elasticity (and thus a relatively low modulus ofelasticity (Young's modulus)) such that it provides a secure, snug,and/or comfortable fit around the foot, and such that the first layer140 has the capability of moving and/or flexing dynamically with thefoot when the article of footwear experiences typical use. When thesecond layer 142 is configured to form an underfoot portion, the secondlayer 142 may be configured to secure to the sole structure 106. Thus,the second bottom surface 162 may be formed with surface characteristicssuitable for facilitating attachment to the sole structure throughsewing, bonding via adhesive, etc. The second layer 142 may have arelatively low elasticity (e.g., a high Young's modulus) and arelatively high strength and durability with respect to the first layer140. The relative elasticities may be accomplished by selectivelyutilizing a particular knit structure (e.g., a ribbed knit structure, asingle jersey knit structure, or a double jersey knit structure), byvarying the size and tension of the knit structure, by using one or moreyarns formed of a particular material (e.g., a polyester material, or anelastic material such as spandex) or construction (e.g., multifilamentor monofilament), by selecting yarns of a particular size (e.g.,denier), or a combination thereof.

The elasticity of at least one area of a knitted portion (e.g., aportion of the knitted component 104) may be determined by subjectingthe area to a known amount of force and then measuring the area'selongation. For example, two respective ends of the area may be insertedinto grips on measuring arms of an extensometer, the area may besubjected to a known stretching force (i.e., tensile force), and thenthe deformation may be measured. The modulus of elasticity may then becalculated by determining the force needed to achieve a given amount ofdeformation. In embodiments where the second layer 142 has a lowelasticity (and thus high modulus of elasticity) relative to the firstlayer 142, for example, an area of the second layer 142 may deform lessrelative to an area with the same dimensions of the first layer 140 whenboth areas are subjected to the same amount of stretching force. In onenon-limiting method of measuring elasticity, the applied stretchingforce may be about 5 pounds, but other stretching forces are alsocontemplated (e.g., 1 pound or less, 10 pounds, 20 pounds, 50 pounds,etc.).

FIG. 4 is an illustration showing the knitted component for the articleof footwear of FIGS. 1-3 as it may appear after a knitting process. Asshown, the ankle opening 116 may be provided in the first layer 140. Theankle opening 116 may be formed on the knitting machine when knittingthe knitted component 104 (e.g., by skipping needles where the ankleopening 116 is located), or it may be formed during a post-processingstep (e.g., cutting). If the first layer 140 can be manipulated to formeither an overfoot portion or an underfoot portion (as described in moredetail below), it is contemplated that the ankle opening 116 may beadjustable in size (e.g., via a drawstring, via the natural elasticityof the knit structure, etc.).

As shown in FIG. 4, the second portion 134 and the third portion 136 mayextend from the boundary 150 of the first portion 132. Similarly, a heelportion 164 of the knitted component 104 may extend from the boundary150. The heel portion 164 may include a relatively rigid, strong, and/oranother protective characteristic for providing suitable structure anddurability in the heel area 124 article of footwear. The heel portion164 may overlap (e.g., be coextensive with) the first portion 132 whenin its wearable configuration, and in some embodiments, the heel portion164 may be secured to at least one of the second portion 134 and thethird portion 136. The securement between the heel portion 164 and thesecond portion 134 and/or the third portion 136 may be via a knittedconnection structure 165 (shown in FIG. 2) as is described in moredetail below. The heel portion 164, the second portion 134, and/or thethird portion 136 may have only one layer of knitted material and/or mayhave multiple layers that are tightly bound together such that they areinseparable and/or are not readily distinguishable. The one-layer orbound-layer construction may provide desirable rigidity, elasticity(e.g., relatively low elasticity), durability, and other characteristicsthat may be deemed desirable for an outer surface of an article offootwear. In FIG. 4, the inner surface 146 of the second portion 134,and inner surface 148 of the third portion 136, and an inner surface 166of the heel portion 164 are facing the viewer. When folded or otherwisemanipulated into their wearable orientation, those respective innersurfaces of the heel portion 164, the second portion 134, and the thirdportion 136 may face the void 118.

The heel portion 164, the second portion 134, and/or the third portion136 may be of a single layer (or bound multiple layers) that utilize thefull capacity of two needle beds if a knitting machine when formed. As aresult, the heel portion 164, the second portion 134, and/or the thirdportion 136 may have a relatively strong, inelastic, and durablestructure that provides the knitted component 104 with suitablestrength, rigidity, support, protection, and other advantageouscharacteristics. Thus, the heel portion 164, the second portion 134, andthe third portion 136 may each have an elasticity that is less than theelasticity of the first layer 140 and/or the second layer 142 of thefirst portion 132. Further, the flat nature of the second portion 134and the third portion 136 along with the ability to utilize two beds ofa flat knitting machine to form the second portion 134 and the thirdportion 136 may enhance the ability to include certain knit features,particularly since utilizing the full capacity of two beds (instead ofone) significantly increases the ability to selectively include visualdesigns, varying physical properties, and other features formed by aparticular knit structure, particular yarn(s), or a combination thereof.To illustrate, one yarn type (e.g., a yarn with a thermoplastic polymermaterial composition) may be located on the outer surface 138 (see FIG.2) of the second portion 134 and a different yarn type may be exposed onan inner surface 146 of the second portion 134 (and the same may be trueof the third portion 136). The flat nature of these portions mayadditionally enhance the ability for post-knit processing (e.g.,applying non-knit graphics, heat pressing, etc.).

Advantageously, the unique structure of the knitted component 104depicted in FIG. 4 allows the article of footwear to have both (1) acomfortable and dynamic fit provided by the relatively high elasticityof the first layer 140 of the first portion 132 of the knittedcomponent, and also (2) a sufficiently rigid, protective, durable, andstrong outer surface 138 (FIG. 2) provided by the heel portion 164, thesecond portion 134, and the third portion 136.

In some embodiments, the second portion 134 and/or the third portion 136may have a particular shape configured to enhance functional and/orvisual properties of the knitted component 104. As shown in FIG. 4, thesecond portion 134 may be corrugated and have one or more spaces 168between corrugations 170. This embodiment may advantageously increaseheel-to-toe flexibility of the article of footwear, for example, whilemaintaining adequate medial-to-lateral support. The third portion 136may include a similar construction, but this is optional. As shown, thethird portion 136 covers substantially all of the medial side of thearticle of footwear, which may be advantageous when a high degree ofstretch resistance and support is needed in that area. Any othersuitable shape for the second portion 134 and the third portion 136 iscontemplated.

FIG. 5 is an illustration showing another embodiment of an article offootwear 200 including a knitted component 204 in accordance with thepresent disclosure. The knitted component 204 may be similar to theknitted component 104 described with reference to FIGS. 1-4 above, butthe knitted component 204 shown in FIG. 5 may additionally include aforward portion 272 extending from a toe area 226 of a first portion 232of the knitted component 204. The forward portion 272 may include atoebox area 274 and a tongue 276. As describe above with respect toother knitted portions, the first portion 232 may be have multipleseparable layers and may be located between a second portion 234 and athird portion 236. The second portion 234 and/or the third portion 236may form an outer surface 238 of the knitted component 204. The forwardportion 272 may have one or more layers (separable or bound), and atleast one portion of the forward portion 272 may primarily include aknit structure (e.g., a double jersey knit structure) utilizing twoneedle beds of a knitting machine (though this is optional).

The tongue 276 may extend from the toebox area 274 and over a throatarea 214 when the knitted component 204 is in its wearableconfiguration. A lateral edge 278 of the tongue 276 may be overlapped by(i.e., at least partially coextensive with) the second portion 234, anda medial edge (not show) of the tongue 276 may be overlapped by thethird portion 236 (shown in FIG. 6) when in its wearable configuration.Advantageously, the tongue 276 may be pulled by a user to facilitateentry of a foot into a void of the article of footwear, and the tongue276 may provide additional protection to the dorsal surface of the foot.The toebox area 274 may provide additional structural characteristicsand protection at the toe area 226 of the knitted component 204. Theforward portion 272 may be formed on a knitting machine with theremainder of the knitted component 204 such that no post-knittingattachment step is needed, or, the forward portion 272 may be formedseparate and then attached after the knitting process.

FIG. 6 is an illustration showing a second lateral side view of thearticle of footwear 200 of FIG. 5, where certain portions the secondportion 234, the third portion 236, and the forward portion 272 are in aspread or opened configuration to showcase certain features. As shown,the first portion 232, like the first portion 132 of FIGS. 1-4, may be amulti-layer knitted portion where a first layer 240 is located above thefoot when the article of footwear 200 is in use. The tongue 276, whichis pulled forward in the present view, may overlap the first layer 240when the article of footwear is worn. The tongue 276 may have edges 280on its medial and lateral sides that are free and unsecured with respectto the second portion 234 and the third portion 236 of the knittedcomponent 204. In contrast, the toebox area 274 of the forward portion272 may be secured to the second portion 234 and the third portion 236via a connection structure 282.

As described in more detail below, the connection structure 282 may be aknitted connection structure (e.g., formed on a knitting machine), andno post-knitting steps may be necessary for connecting the toebox area274 to the second portion 234 and/or the third portion 236. In otherembodiments, the connection structure 282 may incorporate a sewn seam,an adhesive, a mechanical clamp or other fastening device, or any othersuitable device or method for securing the toebox area 274 to the secondportion 234 and/or the third portion 236. Advantageously, and asdescribed in more detail below, securing the toebox area 274 of theforward portion 272 to at least one of the second portion 234 and thethird portion 236 via the connection structure 282 may result in thetoebox area 274 curving into a cup-like shape with a cavity. The cavitymay form a portion of the void of the article of footwear for receivinga foot. However, it is also contemplated that that the toebox area 274may be secured only via the front of the first portion 232 such that thetoebox area 274 is not directly secured to either of the second portion234 or the third portion 236.

FIG. 7 is an illustration showing a knitting pattern for forming theknitted component 204 of FIGS. 5-6. While individual courses are notshown, the courses may extend horizontally from the viewpoint of FIG. 7.The knitting sequence may be performed in the direction depicted by thearrow 284 (such that courses are added to the knitting component in thedirection of the arrow 284). The knitted component 204, when beingformed, may move against the arrow with respect to the needle beds of aknitting machine. When this direction is used, the heel portion 264 ofthe knitted component 204 may be formed first, and a collar 220 of theheel portion 264 may be at least partially formed by approximately thefirst formed course of the knitted component 204. The end 286 of thetongue 276 may be formed by the last course of the knitted component204.

Since the course-wise direction may be horizontal from the viewpoint ofFIG. 7, certain courses may extend from an outer lateral edge 288 of thesecond portion 234, through the first portion 232, and to an outermedial edge 290 of the third portion 236. When the first portion 232includes multiple layers, the multiple layers may converge and besecured together at the boundary 250. Thus, the second portion 234 mayextend from the point where the multiple separable layers of the firstportion 232 converge (i.e., the boundary 250). This may be advantageoussince yarns of both the first layer 240 and the second layer 242 (shownin FIG. 6) of the first portion 232 can be incorporated into the secondportion 234 and so the second portion 234 may have a rigid, durable, andstrong structure formed using the full capacity of two needle beds withall yarns from the relative layers of the first portion 232. The thirdportion 236 has similar advantages due to its position along lateralside of the boundary 250, which also may be a location where theseparable layers of the first portion 232 converge. It is noted that thefirst portion 232 may not include separable layers in all embodiments.

As describe above, the forward portion 272 of the knitted component 204may secure to the second portion 234 and/or the third portion 236 via aconnection structure 282 (which is represented by the depicted arrows inFIG. 7). The connection structure 282 may be formed using a techniquewhere, as the knitting pattern narrows, the knitting machine holds outerloops on needles of a needle bed for a certain number of courses untilthe pattern again widens. Specifically, referring to the edge 292 alongthe second portion 234 of FIG. 7, the loops of the courses defining thesecond portion 234 along the edge 292 may be formed during formation ofthe second portion 234 and then held for a series of consecutivepasses/courses as the knitting machine continues to knit. Similarly theedge 292 of the third portion 236 may have loops that are held duringthe formation of additional courses of the first portion 232. As thepattern continues to narrow, more courses may be held.

In the example shown, when the knitting machine reaches the end of thefirst portion 232 and begins knitting the forward portion 272, the heldloops may be re-incorporated into new courses when forming the forwardportion 272 and as the knitting pattern widens. In some instances, theheld loops may be transferred inward (or outward) such that theplacement of the held loops on the needle bed matches their location ofincorporated into a new course (which may be determined by a knittingprogram). For example, the loops of the edge 292 may incrementally betransferred between beds and inward/outward until the location of theloops matches the width of the knitting pattern at its respectiveposition of the forward portion 272.

The order of re-incorporation of loops may be inverted with respect tothe order that those loops are initially formed. To illustrate, a firstloop 294 on the edge 292 may be initially formed before a second loop296 on the edge 292 when knitting the second portion 234 of the knittedcomponent 204. However, the second loop 296 may be incorporated into acourse of the forward portion 272 prior to the first loop 294 beingincorporated into a course of the forward portion 272. As a result, theforward portion 272 may curve into a cup-like shape in the toe area ofthe knitted component 204 as it is pulled back towards the throat areaof the knitted component due to tension in the courses of the forwardportion 272, the second portion 234 and/or the third portion 236. Inother words, the toebox area 274 of the forward portion 272 may becurved such that a cavity is formed between the toebox area 274 and theunderfoot area (defined by at least one layer of the first portion 232),and where the cavity at least partially defines a void for the articleof footwear (shown in FIG. 8).

The loops that are held for at least one course and then reincorporatedinto new, later-formed course may form the connection structure 282. Theconnection structure 282 may be fully formed on the knitting machine(without requiring post-knitting securement between the second portion234 and/or the third portion 236). Once the pattern reaches the tongue276 of the forward portion 272, the courses of the forward portion 272may continue to knit the tongue 276 having two free edges that maydefine discrete sides of the tongue 276.

Incorporation of the loops from the edge 292 into the forward portion272 may require the forward portion 272 and/or the second portion 234 toinclude a knit structure that is less than full gauge (at least adjacentto the connection structure 282) such that enough needles area availableto form the connection structure 282. For example, a least a portion ofthe forward portion 272 may have a single jersey knit structure, ahalf-gauge knit structure (or any other gauge less than full-gauge), orany other suitable knit structure. Alternatively (or additionally), thesecond portion 234 and/or the third portion 236 may have a single jerseyknit structure, a half-gauge knit structure, or any other suitable knitstructure adjacent to the connection structure 282. In one particularexample, the depicted edge region 298 of the second portion 234 mayinclude a single jersey knit structure while the remainders of thesecond portion 234 and the third portion 236 include one or more doublejersey structures. The third portion 236 may include a similarstructure.

The heel portion 264 may be secured to at least one of the secondportion 234 and the third portion 236. For example, a medial extension301 of the heel portion 264 may include courses with loops that are heldon the knitting machine until the pattern reaches the second portion234, and a lateral extension 303 of the heel portion 264 may includecourses with loops that are held on the knitting machine until thepattern reaches the third portion 236 (which may form the connectionstructures 265, also shown in FIG. 5). A base 305 of the heel portion264 may extend to the first portion 232.

While the pattern of FIG. 7 and the related description illustrates anddescribes the knitting machine as forming the knitted component in theheel-to-toe direction, the knitting direction may be reversed such thatthe forward portion 272 is formed first and the heel portion 264 isformed last. Alternatively, it is contemplated that the pattern may berotated with respect to a needle bed such that the courses are orienteddifferently than the depicted courses of FIG. 7 (e.g., the courses mayextend in the heel-to-toe direction, diagonally, etc.).

FIG. 8 is an illustration showing a sectional view of the article offootwear 200 taken along line 6-6 of FIG. 6. As shown, the toebox area274 of the forward portion 272 may be curved to form a cavity 309. Thecavity 309 may be located in the toe area 226 of the article of footwear200 and may correspond with a shape of the void 218. In someembodiments, an inner surface 311 of the toebox area 274 may face andform an inner surface of the void 218, particularly when the firstportion 232 of the knitted component 204 does not extend above the void218 (as described below with respect to FIGS. 9-10). As shown in FIG. 8,the tongue 276 of the forward portion 272 have generally free edges 280that are movable with respect to the second portion 234 (shown in FIG.6) and the third portion 236.

FIG. 9 is an illustration showing a lateral side view of anotherembodiment of an article of footwear 400 including a knitted component404. Like the embodiments above, the embodiment of the knitted component404 of FIG. 9 includes a first portion 432 located between a secondportion 434 and a third portion 436. However, the first portion 432 ofthe knitted component 404 does not extend to a throat area 414 andremains substantially at an underfoot portion of the knitted component404. Since the first portion 432 remains located at the underfootportion of the knitted component 404, the second portion 434 and thethird portion 436 may form not only the outer surface 438 on the lateralside 408 and the medial side 410, respectively, but also an innersurface 446 and an inner surface 448 of the knitted component 404 thatface and define the void 418 of the article of footwear. The innersurface 446 and the inner surface 448 may be the inner-most surfaces (orat least the inner-most knit surface) with respect to the void 418 attheir respective locations, and they may be configured to contract afoot (or sock) of a wearer when the article of footwear is in use. It iscontemplated that the inner surface 446 and/or the inner surface 448 maybe formed with particular surface characteristics designed for comfort(e.g., a particular softness, anti-abrasiveness, etc.), for example byutilizing a polyester yarn. Since two needle beds may be used to for thesecond portion 434 and the third portion 436, the outer surface 438formed by the second portion 434 and/or the outer surface 438 formed bythe third portion 436 may have surface characteristics that are bettersuited for outward-exposure (e.g., for protection of the foot, foranti-abrasiveness and durability, for waterproofing, etc.).

When a forward portion 472 with a tongue 476 is included, the tongue 476may also (or alternatively) define the inner surface facing the void 418and may at least partially form the throat area 414 of the knittedcomponent 404. However, the tongue 476 is optional. In embodimentswithout a tongue, the second portion 434 of the knitted component 404and the third portion 436 of the knitted component may approach oneanother and may potentially overlap during normal use such thatsubstantially all of a user's foot is covered by the knitted component404. In other embodiments, portions of the user's foot may remainuncovered (e.g., when the article of footwear is a sandal, for example).

In the embodiment of FIG. 9, the first portion 432 may have only onelayer or bound multi-layer knit structure (e.g., with a double jerseyknit structure for enhanced strength and rigidity). However, at leastsome areas of the first portion 432 may have separable layers that bothform the underfoot portion of the knitted component 404.

Referring to FIG. 10, which is an illustration showing a sectional viewof the article of footwear of FIG. 9 taken along line 9-9, the firstportion 432 of the knitted component 404 may include a first layer 440and a second layer 442. The second layer 442 of the first portion 432may form an underfoot portion of the knitted component that is securedto a sole structure 406 (as described in more detail above). The firstlayer 440 may also form the underfoot portion, and the first layer 440may contact the plantar aspect of the foot (also known as the sole orbottom of a foot) during typical use. In other words, both the firstlayer 440 and the second layer 442 may be located beneath the foot of auser when the article of footwear is in typical use. A first top surface456 of the first layer 440 may form a bottom surface of a void 418 ofthe article of footwear. A first bottom surface 458 of the first layer440 and a second top surface 460 of the second layer 442 may face anddefine a pocket 454, and a second bottom surface 462 of the second layer442 may face and secure to the sole structure 406.

The pocket 454 may be sized and shaped to receive a cushioning element459 (which may be considered a midsole). The cushioning element 459 maybe a separate element from the knitted component 404 and may be insertedinto the pocket 454 after forming the knitted component 404 on aknitting machine. The cushioning element 459 may include a foam (e.g., ablown foam), an insertable element formed of plastic, metal, rubber,textile material (such as a knitted material), or another suitablematerial, or any other suitable object for providing cushioning orprotection or otherwise attenuate ground reaction forces when compressedbetween the foot and the ground during walking, running, or otherambulatory activities. The cushioning element 459 may be inserted intothe pocket 454 in any suitable manner, such as through an opening formedin one of the layers or at another location of the knitted component404, by substantially non-invasive injection (e.g., when a blown foam isused), etc. It is contemplated that the cushioning element 459 may beremovable and/or insertable after the manufacturing process such thatthe user (or other person) may select and interchange particularcushioning elements that have particular characteristics beneficial fora certain foot type or size, a particular activity, a desired level ofcushioning, etc. Optionally, the cushioning element 459 may be at leastpartially movable within the pocket relative to at least one of thefirst bottom surface 458 and the second top surface 460. In otherembodiments, the cushioning element 459 may be secured to one or more ofthe first layer 440 and the second layer 442 via an adhesive, sewing, orany other suitable device or method.

In some embodiments, the cushioning element 459 may be at leastpartially formed on a knitting machine with the remainder of knittedcomponent 404 such that the cushioning element 459 is considered aportion of the knitted component 404. For example, the cushioningelement 459 may include one or more floating yarns formed of arelatively soft material or other material with characteristics thatfacilitate cushioning and/or protection. One particular example of acushioning element may include a plurality cushioning structures definedby one or more floating yarns between the first layer 440 and the secondlayer 442 (see, for example, U.S. Provisional Patent Application No.62/355,153, filed Jun. 27, 2016, which is herein incorporated byreference in its entirety).

A knitted component formed in accordance with at least some of theembodiments above may be capable of different configuration to formdifferent types of footwear, and/or different types of fit. For example,the knitted component 204 of FIG. 6 and the knitted component 404 ofFIG. 9 may have substantially the same knitting pattern even though theknitted component 204 has an additional layer that extends above thefoot of a wearer during use (i.e., the first layer 240 of FIG. 6 isprimarily located above the void while the first layer 440 of FIG. 9 isprimarily located at the underfoot portion). In particular, withreference to FIG. 6 for illustrative purposes, the first layer 240 maybe selectively positioned either above or below the void. Thepositioning of the first layer 240 may be performed during themanufacturing of the article of footwear 200, for example, but afterknitting.

Advantageously, a single knitting program may be used to form two ormore different types of articles of footwear, which may be reducemachine setup time, programming time, training requirements, and thelike. After the knitting process, a post-knitting manufacturing step mayfinalize the position of the first layer 240 by, for example, lastingand heat-processing the article of footwear 200 (see, e.g., an exampleof a last and an associated lasting process is described in in U.S.patent application Ser. No. 12/848,352, filed Aug. 2, 2010, and issuedas U.S. Pat. No. 8,595,878, which is herein incorporated by reference inits entirety), securing the first layer 240 to another element (e.g., acushioning element as described with reference to FIG. 10), cutting theankle opening (if necessary), and/or any other suitable manufacturingstep.

Optionally, the knitted component 204 of FIG. 6 and the knittedcomponent 404 of FIG. 9 may have similar or identical knitting pattersand programs, but may utilize different yarn materials. For example, theyarns forming the first layer 240 of FIG. 6 maybe relatively elasticsuch that the first layer 240 can be stretch over the void, while thefirst layer 440 of FIG. 9 may be formed of relatively inelastic yarns toprovide the underfoot portion of the article of footwear 400 with asuitable degree of strength, rigidity, cushioning, and the like. Thus,during setup, an operator can select particular materials (e.g., yarntypes) which may determine the type of footwear formed.

It is contemplated that the selection of the location of the first layermay be performed by a user after the article of footwear 200 issubstantially manufactured and sold. For example, the first layer 240may be manipulated by the user such that it is located above the footduring some activities (e.g., athletic activities where a particulardegree of tightness and securement is desired), but may also bemanipulated to be located below the foot when the user so desires (e.g.,when a looser fit is desired). In some embodiments, the first layer 240may be water resistant or waterproof, and thus a user may select itsposition based on environmental conditions during a particular time. Theselection of the configuration of the first layer 240 by the user maysimply be performed by selecting where to insert the foot (e.g., in theopening of the first layer 240, or on top of the first layer 240).

All of the structures and methods disclosed and claimed herein can bemade and executed without undue experimentation in light of the presentdisclosure. While this invention may be embodied in many differentforms, specific aspects of the invention are described herein. Thepresent disclosure is an exemplification of the principles of theinvention and is not intended to limit the invention to the particularaspects illustrated. In addition, unless expressly stated to thecontrary, use of the term “a” is intended to include “at least one” or“one or more.” For example, “a yarn” is intended to include “at leastone yarn” or “one or more yarns.”

Any ranges given either in absolute terms or in approximate terms areintended to encompass both, and any definitions used herein are intendedto be clarifying and not limiting. Notwithstanding that the numericalranges and parameters setting forth the broad scope of the invention areapproximations, the numerical values set forth in the specific examplesare reported as precisely as possible. Any numerical value, however,inherently contains certain errors necessarily resulting from thestandard deviation found in their respective testing measurements.Moreover, all ranges disclosed herein are to be understood to encompassany and all subranges (including all fractional and whole values)subsumed therein.

Furthermore, the invention encompasses any and all possible combinationsof some or all of the various aspects described herein. It should alsobe understood that various changes and modifications to the aspectsdescribed herein will be apparent to those skilled in the art. Suchchanges and modifications can be made without departing from the spiritand scope of the invention and without diminishing its intendedadvantages. It is therefore intended that such changes and modificationsbe covered by the appended claims.

We claim:
 1. A knitted component comprising: a first portion, the firstportion having a first layer and a second layer, where the first layerand the second layer each have opposite-facing surfaces, the first layerand the second layer forming a pocket therebetween, and the first layerand the second layer being secured via at least one knit structure ofthe knitted component at a boundary of the first portion; and a secondportion extending from the boundary of the first portion and secured atthe boundary via at least one knit structure of the knitted component,wherein the second portion forms an outer surface of an article offootwear on at least one of a medial and lateral side, wherein thesecond layer of the first portion at least partially forms an underfootarea of the knitted component, and wherein the first layer of the firstportion forms at least one of: (a) an overfoot portion of an article offootwear such that the pocket forms a void of the article of footwearfor receiving a foot and such that the first layer forms a top surfaceof the void, and (b) an underfoot portion of the article of footwearsuch that the first layer forms a bottom surface of the void of thearticle of footwear.
 2. The knitted component of claim 1, wherein thefirst layer of the first portion has a first modulus of elasticity andthe second layer of the first portion has a second modulus ofelasticity, wherein the second modulus of elasticity is greater than thefirst modulus of elasticity.
 3. The knitted component of claim 1,wherein the first layer forms the overfoot portion.
 4. The knittedcomponent of claim 1, wherein the first layer forms the underfootportion.
 5. The knitted component of claim 1, wherein the second portionoverlaps the first layer when the first layer forms an overfoot portionof the article of footwear.
 6. The knitted component of claim 1, whereinthe second portion of the knitted component forms a surface on thelateral side of the article of footwear, and the knitted componentfurther comprising: a third portion, the third portion extending fromthe first portion, wherein the third portion forms a surface on themedial side of the article of footwear, and wherein the third portion issecured to the first portion via the knit structure of the knittedcomponent.
 7. A knitted component comprising: a first portion having afirst layer with two opposite-facing surfaces and a second layer withtwo opposite-facing surfaces, the first layer and the second layerforming a pocket therebetween, and the first layer and the second layersharing at least one common knit structure at a boundary; and a secondportion extending from the boundary of the first portion and sharing atleast one common knit structure with the first portion at the boundary,wherein the second portion forms an outer surface on at least one of alateral side and a medial side of an article of footwear.
 8. The articleof footwear of claim 7, wherein the first layer of the first portion ofthe knitted component has a modulus of elasticity that is lower than amodulus of elasticity of the second portion of the knitted component. 9.The article of footwear of claim 7, wherein the second layer of thefirst portion of the knitted component forms an underfoot portion of thearticle of footwear.
 10. The article of footwear of claim 9, wherein thefirst layer of the first portion of the knitted component also forms theunderfoot portion of the article of footwear.
 11. The article offootwear of claim 10, wherein the pocket receives a cushioning elementfor providing underfoot cushioning.
 12. The article of footwear of claim7, wherein the first layer of the first portion of the knitted componentforms an overfoot portion of the article of footwear, and wherein thepocket forms a void for receiving a foot.
 13. The article of footwear ofclaim 12, wherein a gauge of at least one of the first layer and thesecond layer is at least 25% less than a gauge of the second portion ofthe knitted component.
 14. The article of footwear of claim 7, whereinthe second portion includes at least one lace receiving element forreceiving a lace.
 15. The article of footwear of claim 7, wherein thesecond portion of the knitted component forms a surface on the lateralside of the article of footwear, and the knitted component furthercomprising a third portion, the third portion extending from the firstportion forming a surface on the medial side of the article of footwear,wherein the third portion is secured to the first portion via the knitstructure of the knitted component.
 16. A method comprising: knitting afirst portion of a knitted component, the first portion having a firstlayer and a second layer each having opposite-facing surfaces, the firstlayer and the second layer forming a pocket therebetween, and the firstlayer and the second layer being secured via a knit structure of theknitted component at a boundary of the first portion; and knitting asecond portion of the knitted component, the second portion extendingfrom the boundary of the first portion and secured at the boundary viaat least one knit structure, wherein the second portion forms an outersurface of an article of footwear, wherein the second layer of the firstportion at least partially forms an underfoot area of the knittedcomponent, and wherein the first layer of the first portion forms atleast one of: (a) an overfoot portion of an article of footwear suchthat the pocket forms a void of the article of footwear for receiving afoot and such that the first layer forms a top surface of the void, and(b) an underfoot portion of the article of footwear such that the firstlayer forms a bottom surface of the void of the article of footwear. 17.The method of claim 16, wherein the first layer of the first portion ofthe knitted component has a modulus of elasticity that is relatively lowwith respect to a modulus of elasticity of the second portion of theknitted component.
 18. The method of claim 16, further comprisingmanipulating the first layer such that it forms the overfoot portion.19. The method of claim 18, wherein the second portion overlaps thefirst layer when the first layer forms an overfoot portion of thearticle of footwear
 20. The method of claim 16, further comprisingmanipulating the first layer such that it forms the underfoot portion.